[PATCH 1/9] drm/fourcc: Add macro to check for the modifier vendor

Thierry Reding
2021-03-23T15:55:11Z

From: Thierry Reding <treding@nvidia.com>

This is useful for checking at runtime whether a given modifier is from
a specific vendor so that any vendor-specific parsing can be done.

Signed-off-by: Thierry Reding <treding@nvidia.com>
---
include/uapi/drm/drm_fourcc.h | 3 +++
1 file changed, 3 insertions(+)

diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h
index f76de49c768f..567fd4566e08 100644
--- a/include/uapi/drm/drm_fourcc.h
+++ b/include/uapi/drm/drm_fourcc.h
@@ -366,6 +366,9 @@ extern "C" {

#define DRM_FORMAT_RESERVED ((1ULL << 56) - 1)

+#define fourcc_mod_is_vendor(modifier, vendor) \
+ ((((modifier) >> 56) & 0xff) == DRM_FORMAT_MOD_VENDOR_## vendor)
+
#define fourcc_mod_code(vendor, val) \
((((__u64)DRM_FORMAT_MOD_VENDOR_## vendor) << 56) | ((val) & 0x00ffffffffffffffULL))

--
2.30.2